Define a "winner?"
PG: Harris, Watson, Tinsley
SG: Bell, Miles, Burks
SF: Hayward, Carroll
PF: Millsap, Favors
C: Jefferson, Kanter
Coming off 36-30 season. Certainly in position to be a winning team. Maybe 45-48 tops? That roster was never going to win 50 games. And that's what it may take to even get a playoff spot this season.
Didn't we have essentially the same team the next season? Tried to upgrade at PG with Mo instead of Devin. Finally gave up on CJ and brought in Foye. Strengthened the bench by trading for Marvin Williams. Yes, Utah had a winning season (43-39), but what good did that do? Jazz finished 2 games out of the playoffs.
Additionally, you can't keep all those guys. Burks, Hayward, Favors and Kanter were all on rookie deals. You have to make some choices, just as OKC did with Harden.
Let Big Al, Foye and Mo go. Re-sign Millsap and Carroll. Draft Trey to replace Mo. That was likely the strategy proposed by Kevin "re-tool" O'Connor. Valid strategy. What would be the end result? Do they ever win 50 games? Do they ever win 55 and get home court in the first round? We could argue about that, but I say no. Destiny, IMO: fighting for 7th/8th seed for a few years. Eliminated in 1st round each time.
Now, I'm not sure we'll ever see a 55-60 win team. But I do support at least TRYING to get a franchise player. Will Exum ever be a star? Will he approach Stockton-type status? Will we draft the next Karl Malone with our pick this summer? I have no idea. But as has been argued ad infinitum on this board, you don't "WIN" in the NBA without superstars. And if we can't trade for one or attract one via free agency (and Utah hasn't been able to do that in 35 years...unless you consider Hornacek a superstar), then the ONLY chance Utah has is to try to draft one.
To me, being a winner is aspiring to a championship. So I answer your question as this: the team in the summer of 2012 had ZERO chance of EVER being a winner. Right now? I have no idea. The team is incomplete and we just don't know how good guys like Exum, Gobert and our 1st-round pick in 2015 are going to be. Plus, we should have the cap space to add another high-salaried player. Ask me the same question at this time next season.